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volcano's/earthquake
| Term | Definition |
|---|---|
| Short Range | early warning based on strains in the rocks near a fauly |
| long range | cyclical and repetitive |
| Active volvanoes | ex. ring of fire volcanoes that erupt |
| magma | formation crust and upper mantle |
| Factors affecting eruption | dissolved gases ---> water vapor, viscosity (temp. and chemical comp.) |
| characteristics of a explosive volcano | high gases, viscosity, and silica |
| types of pyroclastic materials | ash and dust cinder and lapilli blocks and lava bombs |
| factors affecting lava flows | silica content ---> low temp. |
| pahoehoe | hot fast smooth |
| aa | cooler slower rough and jagged |
| sheild | flat large made from lava flows |
| cinder | steep erupts once ejected lava |
| oceanic- oceanic | seduction volcanic island arc |
| oceanic Continental | ocean plate is abducted continental volcanic arcs |
| fault | fracture where movements have occurred |
| elastic rebound | theory for cause of earthquakes, how energy is released |
| p waves, s waves, and surface waves | all body waves |
| p waves | compression waves push pull faster than s waves |
| s waves | transverse waves slower than p waves |
| surface waves | moves in all directions faster than p and s waves most destructive |